Lync unable to connect to Server

Posted on 2012-08-17
Last Modified: 2012-10-02
User  is getting an error message every time he tries to login to Lync.
This is error user getting User is getting Message that :- Cannot sign in because server is temporarily unavailable.
If the problem continues , Please contact your support team.
Question by:UDSquare
    LVL 9

    Expert Comment

    is the user in the right pool? Is this in the office or from a remote location?

    Author Comment

    User is placed at right pool. And user is in same office.
    LVL 33

    Accepted Solution

    Couple of quick points,

    Hope your Lync Server has a cert installed on it

    Go to Options -> Personal -> Advanced and provide the Lync Pool FQDN and try

    Go to Options -> Personal -> Advanced and provide the Lync Pool IP Address and try

    Go to C:\Users\user\AppData\Local\Microsoft\Communicator\sip_address and delete the profile

    check if DNS is working fine w.r.t SIP lookups - Open command prompt type - nslookup - hit enter - type set type=all - hit enter - type - hit enter - check the results.

    Worst, case scenario we'll enable logging and view the results of it to understand where it failed.

    LVL 18

    Expert Comment


    I've seen this error happen if the user is not typing in the correct SIP sign-in address as opposed to their email address, which should be what has been provisioned on the Lync server.

    Can you confirm that you can login to this persons account correctly? As per the Lync backend configuration and testing their credentials against OWA to be 100% sure.

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    Why You Should Analyze Threat Actor TTPs

    After years of analyzing threat actor behavior, it’s become clear that at any given time there are specific tactics, techniques, and procedures (TTPs) that are particularly prevalent. By analyzing and understanding these TTPs, you can dramatically enhance your security program.

    User Beware!  This is a rather permanent solution to removing your email from an exchange server.  The only way to truly go back is to have your exchange administrator restore your mailbox from backups.  This is usually the option of last resort.  A…
    Recently Microsoft released a brand new function called CONCAT. It's supposed to replace its predecessor CONCATENATE. But how does it work? And what's new? In this article, we take a closer look at all of this - we even included an exercise file for…
    The viewer will learn how to use a discrete random variable to simulate the return on an investment over a period of years, create a Monte Carlo simulation using the discrete random variable, and create a graph to represent the possible returns over…
    Excel styles will make formatting consistent and let you apply and change formatting faster. In this tutorial, you'll learn how to use Excel's built-in styles, how to modify styles, and how to create your own. You'll also learn how to use your custo…

    760 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    7 Experts available now in Live!

    Get 1:1 Help Now